36results about How to "Reasonable manufacturing process" patented technology

The present invention provides a method for producing polyvinyl acetal resin, which is characterized in that polyvinyl alcohol and carboxyl groups are mixed at 40 to 200°C in the presence of an acid catalyst containing carbon dioxide in a liquid using water and / or alcohol as a solvent. Compound reaction. According to this method, a polyvinyl acetal resin having a halogen content of 100 ppm or less and an alkali metal element content of 1000 ppm or less can be obtained without special washing operation. Therefore, the present invention provides a method for producing a polyvinyl acetal resin in which impurities such as metal salts and acids remain little.

The invention discloses a conducting piece for connecting a power source and a circuit board. The conducting piece comprises a conducting piece body; the conducting piece body mainly comprises a connecting piece, at least one fixed terminal arranged at one end of the connecting piece and a pluggable terminal arranged at the other end of the connecting piece; and a silver plating layer is formed on the periphery of the end part of the pluggable terminal. According to the conducting piece for connecting the power source and the circuit board, the silver plating layer is formed at the end of the pluggable terminal and used for conducting connection between the power source and the circuit board of an automobile, the sparking phenomenon cannot occur when the power source is started; and the conducting piece is simple in structure and is safe in use. According to the preparation method of the conducting piece for connecting the power source and the circuit board, the preparation process is reasonable, products are not prone to being scratched, the yield is high, and the thickness of the plating layer on the conducting piece is uniform; and the silver plating layer is only formed on the offset part of the pluggable terminal, the silver plating layer is not formed on other positions, so that the cost is effectively reduced.

The invention discloses desert mulberry leaf tea, which is prepared by the following steps of: collecting fresh desert mulberry leaves, cleaning, dehydrating, spreading and airing for withering, cutting the leaves, killing under sweltering condition, performing heat rolling, and baking; piling, spreading and airing; performing instantaneous aroma extraction; spreading, airing, bagging, and warehousing for returning aroma; and mixing, sieving, packaging, inspecting and warehousing. The making process is reasonable and effective; the tea has good shape, color and taste; the liquor color of the tea is yellow green; the nutrients of the mulberry leaves and the activity of active ingredients are protected to the greatest extent; the bitter and acerbity of organic acid in the mulberry leaves are removed; the tea has conditioning effects of dispelling wind and clearing heat, clearing liver and improving vision, reducing blood sugar, blood cholesterol and blood pressure, expelling toxin and beautifying skin, regulating adrenal gland and the like; the tea does not contain theophylline, so the problem that patients suffering from stomach illness and insomnia are not suitable for drinking tea is solved; moreover, the product is nontoxic and safe and suitable for long-term use, meets requirements of different consumption levels, and has wide promotion and application prospect.